/*
 * Copyright 2000-2017 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.intellij.util.containers;

import com.intellij.util.containers.hash.EqualityPolicy;
import com.intellij.util.containers.hash.LinkedHashMap;
import org.jetbrains.annotations.NotNull;

import java.util.Collection;
import java.util.Map;

/**
 * @author Evgeny Gerashchenko
 */
public class LinkedMultiMap<K, V> extends MultiMap<K, V> {
    @NotNull
    @Override
    protected Map<K, Collection<V>> createMap() {
        return new LinkedHashMap<K, Collection<V>>(getEqualityPolicy());
    }

    @NotNull
    @Override
    protected Map<K, Collection<V>> createMap(int initialCapacity, float loadFactor) {
        return new LinkedHashMap<K, Collection<V>>(initialCapacity, loadFactor, getEqualityPolicy());
    }

    protected EqualityPolicy<K> getEqualityPolicy() {
        return (EqualityPolicy<K>) EqualityPolicy.CANONICAL;
    }
}
